Find the equation, in standard form, of the line passing through the points (5,1) and (-2,3).
a: 7x+2y=-17
b: 2x-7y=17
c :y=7/2x-7
d: 2x+7y=17
a: 7x+2y=-17
b: 2x-7y=17
c :y=7/2x-7
d: 2x+7y=17